int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
struct exfat_iterator* it);
void exfat_closedir(struct exfat* ef, struct exfat_iterator* it);
int exfat_opendir(struct exfat* ef, struct exfat_node* dir,
struct exfat_iterator* it);
void exfat_closedir(struct exfat* ef, struct exfat_iterator* it);